论文部分内容阅读
以通快公司生产的某型号数控冲床为研究对象,介绍了该型号数控冲床中旋转丝杠冲头装置的结构及其工作原理,并对其丝杠进行了有限元分析。对丝杠模型进行简化,使用有限元分析软件ANSYS通过模态分析得到了丝杠前10阶固有频率和振型,并通过实验验证了建模和分析的正确性。模态分析结果表明,当激振频率接近第八阶固有频率时,易对冲头造成破坏。因此在设计时可根据固有频率得到丝杠刚性薄弱的部位,给予加强,并对其进行谐振响应分析,观察丝杠在外部激振下的响应,校核安全条件下丝杠的最高转速,尽量避免丝杠冲头在谐振频率下工作。
Taking a CNC punching machine manufactured by Tongrui as the research object, the structure and working principle of the rotary screw punching device in this type NC punching machine are introduced, and the finite element analysis of the screw is carried out. The screw model is simplified. The first ten natural frequencies and modes of the screw are obtained by modal analysis using finite element analysis software ANSYS, and the correctness of the modeling and analysis is verified by experiments. The results of modal analysis show that when the excitation frequency is close to the eighth natural frequency, it is easy to damage the punch. Therefore, the design of the site can be based on the inherent frequency of the poor rigidity of the screw to give reinforcements, and its resonant response analysis to observe the screw under the external excitation in response to verify the maximum screw speed under safe conditions, as far as possible Avoid screw punch work at the resonant frequency.