LED分拣机属于高速、高精、高可靠性设备,而摆臂是其核心部件,摆臂高速旋转的动态特性直接影响芯片的分拣.基于悬臂梁理论,分析摆臂的运动规律确认摆臂的静刚度及固有频率是影响其动态特性的关键.利用ANSYS软件,分别对不同铺层角度的摆臂进行静动态特性分析,确认最优铺层角度.为保证摆臂的静刚度和固有频率,对摆臂尺寸进行优化设计.结果表明,铺层角度对摆臂的静动态特性影响几乎没有,而优化设计后的摆臂质量增加6.8%,静刚度增加11.7%,二阶固有频率增加3%.%Light Emitting Diode(LED)sorting machine is high speed,high precision and high reliability equipment. Swing arm is the most impotent part of the machine. The dynamic characteristic of the high speed rotatable swing arm will directly influence the sorting of chip. Based on cantilever beam theory, the static stiffness and natural frequency of swing arm are the keys to its dynamic characteristics by analyzing the movement of the swinging arm.The static and dynamic characteristics of the different ply angles of swing arms were analyzed separately by the ANSYS software. The optimal ply angle was confirmed. In order to ensure the static stiffness and natural frequency of swing arm,the sizes of swing arm were optimized. The results show that ply angles do not affect the static and dy-namic characteristics of swing arm. After the optimization design of swing arm,the weight is increased of 6.8%,the static stiffness is increased of 11.7%,and the nature frequency is increased of 3%.
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