By example of CNC turret punch press,discusses how to calculate its free frequency.Theoretical base is provided to dynamic property design of frame and to increase SPM of press.

• 并以数控冲模回转头压力机为例，就如何计算机身的固有频率进行了探讨，为曲柄压力机机身的动态性能设计并提高其行程次数提供了理论依据。