基于柔顺机构的压电式微喷点胶系统设计与性能分析

胡俊峰; 梁龙; 赵永祥

doi:doi:10.3788/ope.20192709.1990

光学精密工程, 2019, 27 (9): 1990, 网络出版: 2019-10-14

基于柔顺机构的压电式微喷点胶系统设计与性能分析

Design and performance analysis of piezoelectric micro-spray dispensing system based on compliant mechanism

论文大纲

胡俊峰 ^*梁龙赵永祥

作者单位

江西理工大学机电工程学院, 江西赣州 341000

微喷点胶系统柔顺机构压电驱动器伪刚体方法 micro-spray dispensing system compliant mechanism piezoelectric actuator pseudo rigid body method

摘要

基于柔顺机构设计了一种新型压电式微喷点胶系统, 该系统由供胶装置、驱动装置和撞针阀组成。点胶系统的运动特征是利用柔顺机构的弹性变形驱动撞针往复直线运动实现撞针阀的开启和闭合, 完成微喷点胶功能。采用伪刚体方法得到点胶系统的驱动力、输出位移和频率特性, 结果表明, 系统的最大驱动力、输出位移和频率分别为56.4 N, 808 μm, 245 Hz, 说明所设计的点胶系统能满足所需的驱动力、行程和点胶速度。制作样机, 通过实验分析驱动电压信号的占空比、幅值、频率和胶液黏度对胶滴直径的影响, 得到了正常胶滴形成需满足的条件。实验结果表明: 系统的最高点胶频率为210 Hz, 最小胶滴直径为630 μm, 胶滴一致性误差为5.62%, 说明所设计的点胶系统具有较好的性能, 为微喷点胶系统设计和应用提供新的思路。

Abstract

A novel piezoelectric microspray dispensing system was designed based on a compliant mechanism. The system consisted of a glue supply device, driving device, and pin-impact valve. The motion characteristic of the dispensing system was that the elastic deformation of the compliant mechanism drived the colliding needle to move in a straight line to and fro, so that the opening and closing of the colliding needle valve could perform the function of microspray dispensing. The driving force, output displacement, and frequency characteristics of the dispensing system were obtained by using a pseudo-rigid-body method. The results show that the maximum of driving force, output displacement, and frequency of the system are 56.4 N, 808 μm, and 245 Hz, respectively. Thus, the driving force, stroke, and dispensing speed of the dispensing system can be guaranteed. The prototype was built and the effects of duty cycle, amplitude, frequency of driving voltage signal, and viscosity of glue on the droplet diameter were analyzed experimentally; the conditions for the formation of normal droplets were also determined. The experimental results show that the highest dispensing frequency of the system is 210 Hz, the minimum diameter of the droplets is 630 μm, and the consistency error of the droplets is 5.62 %. In a word, the advantages of the proposed dispensing system are verified, which provides a new concept for the design and application of microspray dispensing system.

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胡俊峰, 梁龙, 赵永祥. 基于柔顺机构的压电式微喷点胶系统设计与性能分析[J]. 光学精密工程, 2019, 27(9): 1990. HU Jun-feng, LIANG Long, ZHAO Yong-xiang. Design and performance analysis of piezoelectric micro-spray dispensing system based on compliant mechanism[J]. Optics and Precision Engineering, 2019, 27(9): 1990.

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