液晶屏老化测试装置运输叉爪的有限元分析

Finite Element Analysis of Transporting Forks for LCD Screen Aging Test Equipment

叉爪在老化测试装置中用于液晶屏的运输,由于其悬臂部分较长,容易导致变形及振动,无法正常运载液晶屏并有可能使液晶屏受损。采用SolidWorks构建叉爪模型,通过力学耦合仿真分析了总变形;利用热模态分析找出最小固有频率;通过对叉爪有载及空载的谐响应分析,研究其幅频特性确定频率的合理区间,并结合驱动叉爪运行的同步带的振动特性与外部激励,求解了叉爪不共振时的负载及空载运行速度区间。经现场测试验证了叉爪结构的平稳性、鲁棒性以及运行速度的合理性。

The fork claw is used for the transportation of the liquid crystal screen in the aging test device.Due to the long cantilever,it is easy to cause the deformation and vibration,so that the liquid crystal screen cannot be normally carried and the liquid crystal panel may be damaged.SolidWorks is used to construct the fork model,and the causes of the deformation are analyzed by mechanical coupling simulation.The minimum natural frequency is found out by thermal modal analysis.The harmonic response analysis of the loaded and unloaded forks is used to study the reasonable interval of the frequency definifed according to the amplitude-frequency characteristics of the forks and combined with the vibration characteristics of the synchronous belt that drives the forks and the external excitation,which is used to solve the load and the no-load running speed interval when the fork does not resonate.The stability,robustness and rationality of the fork structure are verified by the field tests.