石英板振动成型压机动力学特性研究

Research on Dynamics Characteristics of Vibratory Compaction Machine Used for Quartz Plate Production

现有石英板振动成型压机存在振动电机不同步、振动方向不垂直、系统激振力不均匀等诸多涉及动力学的问题,严重影响了石英板的生产效率和品质。分析了石英板振动成型压机的动力系统,建立压机的质量—刚度—阻尼的系统动力学模型;构建振动成型压机的有限元模型,仿真分析其应力分布情况,结果表明关键的底座和顶部冲头部位结构的最大应力均小于4.1MPa;仿真获得了压机的模态及对应的频率,结合振动成型压机实际的使用工况看,应使激振力的振动频率避开8Hz及55Hz;测试分析了振动压机的动力学特性,分析得出在30Hz频率工作时两排电机出现了不同步的问题,在40Hz频率工作时需要采取措施抑制y向大振动。

The existing vibratory compaction machines have a number of dynamics problems including non-synchronous motors,non-perpendicular vibratory directions,uneven excitation forces,which severely limit the production efficiency and quartz plate quality.The dynamic system of a vibratory compaction machine used for quartz plate production was analyzed and its dynamics model was established based on mass-stiffness-damping system.The FE model of vibratory compaction machine was built.The stress distribution was obtained by simulation,which shows the maximum stresses at the critical parts of foundation and top punch are less than 4.1MPa.The modals and corresponding frequencies were also obtained by simulation.Considering the simulated results and actual usage,the frequency of excitation force should avoid 8Hz and 55Hz.The dynamics characteristics of the vibratory compaction machine was tested.It was analyzed that non-synchronous problem of two rows of motors occurs at working frequency of 30Hz and the measure is necessary to control the large vibration in y direction.