LED自动固晶机的固晶机构动力学分析及优化

发布时间：2018-04-03 02:18

本文选题：LED固晶机　切入点：曲柄摇杆　出处：《北京交通大学》2012年硕士论文

【摘要】：我国LED产业高速发展,年消费量已达到1千亿只以上；但国内LED的制造装备水平却严重落后,优质的LED固晶机主要依赖国外进口,且外国高端设备对我国实行禁运。因此,高质量LED制造设备的国产化问题亟待解决。LED固晶机是LED产业中关键的封装设备之一,固晶过程的效率和质量是衡量其性能主要的参数。因此极有必要对固晶机构进行动力学分析及优化,以提高响应速度、缩短稳定时间。首先用弹性连杆机构动力学理论,分析曲柄摇杆机构的固晶机构模型,探索固晶机构振动特性的影响因素。其次通过对机构进行模态分析,得到了摆臂和连杆构件对系统运行影响最明显的结论。然后通过比较选定了刚柔耦合的多体动力学分析方法,用瞬态动力学分析手段,采用单——变量原则,得到了固晶机旋转副阻尼对系统振动衰减效果特性、不同材料中镁铝合金具有最佳降振效果的结论,以及在不同输入曲线函数中三次曲线具有最佳响应特性的结果。之后,通过研究单个柔性零件对应的系统响应特性,得到连杆构件为主要影响构件的结论,并对连杆应力应变特性进行了优化。分析可得固晶臂在极限位置不受驱动力的特点,在摆臂的强度变化不大的情况下,利用结构优化工具重新配置摆臂的材料分布,在不影响强度情况下大大降低了摆臂质量。最后总结出了综合优化方案：换用镁铝合金作为构件机构材料、改用弹性联轴器或同步带连接伺服电机和曲柄轴、用三次函数曲线来驱动曲柄轴、增加连杆部件宽厚、优化摆臂构件的尺寸并在外围加橡胶皮。
[Abstract]:With the rapid development of LED industry in our country, the annual consumption has reached more than 100 billion, but the manufacturing equipment level of domestic LED is seriously backward. The high quality LED solid crystal machine mainly depends on foreign imports, and foreign high-end equipments impose embargo on our country.Therefore, the localization of high quality LED manufacturing equipment needs to be solved urgently. Led solid crystal machine is one of the key packaging equipment in LED industry. The efficiency and quality of solid crystal process are the main parameters to evaluate its performance.Therefore, it is necessary to analyze and optimize the dynamics of solid crystal mechanism in order to improve the response speed and shorten the time of stabilization.Firstly, the dynamic theory of elastic linkage mechanism is used to analyze the solid crystal mechanism model of crank rocker mechanism, and the factors influencing the vibration characteristics of the mechanism are explored.Secondly, through the modal analysis of the mechanism, the most obvious conclusion is obtained that the pendulum arm and the connecting rod have the most obvious influence on the operation of the system.Then, by comparing the rigid-flexible coupling multi-body dynamics analysis method, using the transient dynamic analysis method, using the single-variable principle, obtained the solid crystal machine rotating pair damping to the system vibration attenuation effect characteristic.The conclusion that magnesium-aluminum alloy has the best vibration reduction effect in different materials and the result that cubic curve has the best response characteristic in different input curve function.Then, by studying the system response characteristics of a single flexible part, the conclusion that the connecting rod member is the main component is obtained, and the stress-strain characteristic of the connecting rod is optimized.It is analyzed that the solid crystal arm is not driven by the driving force at the limit position. When the strength of the pendulum arm changes little, the material distribution of the pendulum arm is reconfigured by means of structural optimization tools, and the mass of the pendulum arm is greatly reduced without affecting the strength.Finally, the comprehensive optimization scheme is summarized: replacing magnesium and aluminum alloy as component material, using elastic coupling or synchronous belt to connect servo motor and crank shaft, driving crank shaft with cubic function curve, increasing the width of connecting rod parts,Optimize the size of the swing arm and add rubber skin to the periphery.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN312.8;TH113

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